Accupro 315155 Square End Mill 5/16 in 3 Flute Carbide Zrn

Product Description

The ACCUPRO 315155 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. It features a 5/16 inch diameter with a 13/16 inch length of cut and a 37-degree helix angle that promotes efficient chip evacuation and smooth cutting action. The micrograin carbide construction delivers hardness and wear resistance suited to demanding materials. A zirconium nitride (ZrN) coating reduces friction and extends tool life in ferrous and non-ferrous applications. This is a single-end, center-cutting tool with right-hand cut and right-hand flute direction, installed by machinists and tool-and-die professionals on CNC machining centers and manual knee mills.

This end mill is suited for slotting, profiling, and peripheral milling operations in job shop and production machining settings. The 3-flute configuration balances chip clearance and rigidity, making it a practical choice for medium-to-finishing passes in steel, aluminum, and similar materials. The regular-length profile and consistent 5/16 inch shank diameter allow straightforward mounting in standard collet chucks and end mill holders. It is not extended-reach and does not feature a variable helix, variable index, or chipbreaker geometry.

Key Features

• 5/16 inch mill diameter with tight tolerance of +0.000/-0.002 inches for dimensional accuracy
• 37-degree helix angle promotes efficient chip flow and reduced cutting forces
• ZrN coating lowers friction and extends tool life in a range of workpiece materials
• Micrograin solid carbide construction resists wear and maintains edge sharpness
• Center-cutting design allows plunge entry as well as peripheral and slot milling
• Right-hand cut and right-hand spiral flute direction for standard CNC and manual mill spindles

Compatibility

Designed as a standard 5/16 inch shank end mill compatible with collet chucks, end mill holders, and tool holders accepting a 5/16 inch shank diameter on CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before mounting. Seat the shank to the recommended grip length in the collet or holder and torque the retention mechanism per the toolholder manufacturer specification. Confirm runout with a dial indicator before beginning a cutting operation.